Li4Ti5O12/石墨负极材料的湿法制备与电化学表征

journal6 ›› 2010, Vol. 31 ›› Issue (1): 91-95.

Li₄Ti₅O₁₂/石墨负极材料的湿法制备与电化学表征

（1.吉首大学化学化工学院,湖南吉首 416000;2.中南大学化学化工学院,湖南长沙 410083）

出版日期:2010-01-25 发布日期:2012-04-19

Wet Method Preparation and Electrochemical Characterization of Li₄Ti₅O₁₂/Graphite Anode Material

(1.College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan China;2.School of Chemistry and Chemical Engineering,Central South University,Changsha,410083,China)

Online:2010-01-25 Published:2012-04-19
About author:HE Ze-qiang(1974-),male,was born in Hunan Province,Ph. D.,associate professor.E-mail address:csuhzq@163.com;Tel:+86 743 8563911.
Supported by:
Supported by National Natural Science Foundation of China (20376086);Postdoctoral Science Foundation of China (2005037700);Hunan Provincial Natural Science Foundation of China (07JJ3014);Scientific Research Fund of Hunan Provincial Education Department(07A058);Postdoctoral Science Foundation of Central South University (2004107)

摘要/Abstract

摘要：以无水乙醇为溶剂，醋酸锂、钛酸丁酯和石墨为原料，采用湿法制备了Li₄Ti₅O₁₂/石墨复合材料.采用X-射线衍射、红外光谱、扫描电镜和电化学测试等对合成产物进行了表征.结果表明：600 ℃氩气气氛中煅烧6 h可制得碳质量分数5%左右的Li₄Ti₅O₁₂/石墨复合材料，其可逆容量达到167.1 mAh·g^-1；经80次循环后，0.1C放电时，容量保持率为99.0%，2.0 C放电时容量保持率达到105.1%.与纯Li₄Ti₅O₁₂相比，Li₄Ti₅O₁₂/石墨复合材料具有更好的循环性能和倍率性能，是一种优良的锂离子电池负极材料.

关键词： 锂离子电池, Li₄Ti₅O₁₂, 负极, 湿法

Abstract: Li₄Ti₅O₁₂/graphite composite was prepared by sol-gel method using ethyl alcohol as solvent,lithium acetate and tetrabutyl titanate and graphite as raw materials.Li₄Ti₅O₁₂/graphite composites were characterized by X-ray diffraction(XRD),scanning electron microscopy (SEM) combined with electrochemical tests.Results show that Li₄Ti₅O₁₂/graphite composite with 5% carbon mass fraction containing can be obtained by annealing the precursor at 600 ℃ for 6 h in Ar atomophere.The composites can deliver a specific capacity of 167.1 mAh/g,99.0% and 105.1% of the capacity can be retained after discharged for 80 times at 0.1 C and 2.0 C,respectively.Compared with pureLi₄Ti₅O_12,Li₄Ti₅O₁₂ /graphite composite shares larger discharge capacity,better cyclability and rate performance,suggesting Li₄Ti₅O₁₂/graphite composite is a promising anode material for lithium ion batteries.

Key words: lithium ion batteries, Li4Ti5O12, anode, wet method

何则强, 熊利芝, 梁凯. Li₄Ti₅O₁₂/石墨负极材料的湿法制备与电化学表征[J]. journal6, 2010, 31(1): 91-95.

HE Ze-Qiang, XIONG Li-Zhi, LIANG Kai. Wet Method Preparation and Electrochemical Characterization of Li₄Ti₅O₁₂/Graphite Anode Material[J]. journal6, 2010, 31(1): 91-95.

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Li₄Ti₅O₁₂/石墨负极材料的湿法制备与电化学表征

Wet Method Preparation and Electrochemical Characterization of Li₄Ti₅O₁₂/Graphite Anode Material

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